"Not an in-range integer,..." when using Synergy

[Yoshiaki Kasahara]

Hello,

With recent Emacs trunk, sometimes I see the following message in the
minibuffer:

Not an in-range integer, float, or cons of integers

I'm using Synergy (http://synergy-foss.org/) to share my keyboard and
mouse connected to FreeBSD 8.2 (amd64) with Windows 7 PC.  The error
occurs when the mouse pointer leaves FreeBSD desktop and enters to
Windows desktop.  Emacs is running on FreeBSD side.

debug-on-error is not helpful:

Debugger entered--Lisp error: (error "Not an in-range integer, float, or cons 
of integers")

It seems that it is clipboard related.  When I highlight some text on
Emacs, the error occurs.  But after I copy text on Windows, it doesn't
happen (until I select some text on Emacs again).  Clipboard is shared
by Synergy.

Any ideas?
-- 
Yoshiaki Kasahara
Research Institute for Information Technology, Kyushu University
address@hidden